How to Use LS35-12: Examples, Pinouts, and Specs

The LS35-12 is a compact, low-profile switching power supply designed for a wide range of electronic applications. It delivers a stable 12V DC output with a maximum current of 2.9A, making it ideal for powering devices such as LED strips, small motors, sensors, and other low-power electronics. Its efficient design and reliable performance make it a popular choice for hobbyists, engineers, and system integrators.

• Powering LED strips and lighting systems
• Driving small DC motors
• Supplying power to microcontroller-based projects
• General-purpose low-power electronic devices

The LS35-12 has screw terminal connections for input and output. Below is the pin configuration:

1. Input Connection:

   • Connect the AC input terminals (L and N) to a power source within the range of 85-264V AC.
   • Ensure proper grounding by connecting the FG terminal to the earth ground.

2. Output Connection:

   • Connect the +V terminal to the positive input of your load (e.g., LED strip, motor).
   • Connect the -V terminal to the ground of your load.

3. Load Considerations:

   • Ensure the total load does not exceed the maximum output power of 35W (2.9A at 12V).
   • For inductive loads (e.g., motors), consider adding a flyback diode to protect the power supply.

4. Mounting:

   • Secure the LS35-12 in a well-ventilated area to prevent overheating.
   • Avoid placing it near heat-sensitive components or in enclosed spaces without airflow.

• Safety: Always disconnect the power supply from the mains before making any connections.
• Ventilation: Ensure adequate airflow around the power supply to maintain safe operating temperatures.
• Fuse Protection: Use an appropriate fuse on the AC input line to protect against overcurrent conditions.
• Polarity: Double-check the polarity of the output connections to avoid damaging your load.

The LS35-12 can be used to power an Arduino UNO and additional peripherals like sensors or actuators. Below is an example circuit and code:

1. Connect the +V terminal of the LS35-12 to the Arduino's VIN pin.
2. Connect the -V terminal of the LS35-12 to the Arduino's GND pin.
3. Ensure the LS35-12 is properly grounded via the FG terminal.

// Example code to blink an LED connected to pin 13 of the Arduino UNO
// Ensure the LS35-12 is providing a stable 12V to the Arduino's VIN pin

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. Can the LS35-12 be used with a battery?

   • No, the LS35-12 is designed for AC input and cannot be directly powered by a battery.

2. What happens if the load exceeds 2.9A?

   • The power supply will activate overload protection and shut down to prevent damage.

3. Can I use the LS35-12 outdoors?

   • The LS35-12 is not weatherproof. Use it in a dry, indoor environment or within a weatherproof enclosure.

4. Is the output voltage adjustable?

   • No, the LS35-12 provides a fixed 12V output.

By following this documentation, you can safely and effectively use the LS35-12 in your electronic projects.